It is straightforward to obtain minimum GM (or
maximum KG) values which comply with the relevant intact
stability requirements, and can be expressed by a unique curve against
ship draught.
However, it is not possible to obtain a unique set of minimum GM values for deepest load draught (d
l)
and for partially loaded draught (d
p) which
ensure compliance with regulations 25-1
to 25-6, because there are an infinite number of sets of GM s
to meet the regulations.
Therefore, one approach might be to choose a GM value
for the deepest loaded draught as close as possible to the minimum GM value relevant to the intact stability requirements based
on a realistic loading condition, then vary the GM value
for partial loaded draught while retaining a realistic loading condition
and obtain a limiting value of GM to comply with regulations 25-1 to 25-6.
Of course, other practical approaches may also be taken.